1. Introduction：

DDC is a complex-valued digital down-converter with a configurable number of decimation stages.  The design is ideal for high sample-rate applications and permits a digital input signal to be mixed-
down and re-sampled at a lower data rate.  The DDC is suitable for the down-conversion   of   any   digitally   modulated   signal   to   baseband   –   an essential step before digital processing.

The DDC features a high-precision 16-bit DDS oscillator for the digital mixing stage.   This oscillator is fully programmable and offers excellent phase and frequency resolution.  The digital mixing stage  is a complex multiplier that allows  the mixing of both real and imaginary (I/Q) inputs.  If only real inputs are required, then the imaginary input (q_in) should be tied low.

The output decimation stage features a configurable decimate-by-2^N  poly-phase   filter   for   both   I   and   Q   channels.     Each   filter   stage   is   highly optimized to use only 12 multipliers while still achieving 80 dB of stop-band attenuation.

 

Application

• Compatible with any digital modulation scheme - e.g. QPSK, BPSK, QAM, WiMAX, WCDMA, COFDM etc.
• Conversion of IF signals to baseband frequencies for subsequent processing
• Digital I/Q Demodulators

 

 

2. License Price：

By Quotes

Multiple License : NO

3. Clock Rate：

250 MHz

4. Logic Gate Count：

None

5. Technology：

None

6. Version：

1.0